Engraving-machine.



No. 881,021. PATENTED MAR. 3, 1908.

J. A. MGLANE.

ENGRAVING MACHINE.

APPLICATION FILED MAY 3, 1907.

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No. 881,021. I PATENT-ED MAR. 3, 190's.

J. A. McLANE.

ENGRAVING MACHINE.

APPLICATION FILED HAY 3, 1907. 4 SHEETS SHEET 2. I

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No. 881,021. PATENTED MAR.'3, 1908.

J. A. McLANE, r I ENGRAVINGMAGHINE. APPLICATION FILED HAYS. 1907. 4 mi-SHEET 3.,

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No. 881,021. PATENTED MAR. 3, 1908. J. A. MGLANE.

'ENGRAVING MACHINE.

APPLICATION FILED M Y3 1907.

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UNITED STATES PATENT OFFICE.

JOSEPH A. MCLANE, OF GRAFTON, WEST VIRGINIA, ASSIGNOR TO PATENT HOLDING AND MANUFACTURING COMPANY, OF GRAFTON, WEST VIRGINIA, A CORPORATION OF WEST VIRGINIA.

ENGRAVING-MACHINE Application filed May 3, 1907.

To all whom it may concern:

Be it known that I, J OSEPH A. MoLANE, a citizen of the United States, residing at Grafton, in the county of Taylor and State of Vest Virginia, have invented a certain new and useful Im rovement in Engraving-Machines, of whic the following is a specification.

My invention relates to improvements in that class of machines for engraving or cutting glass blanks in which a cutting tool is caused to move in a positive manner imparted and regulated by the movement of a stylus or tracer following the indentations and contour of the model orpattern to be reproduced, and it has for its objects to provide a simple, durable, and comparatively inexpensive mechanical means to either duplicate, enlarge, or reduce any given design without the necessity of employing skilled labor, and while my invention is primarily designed to operate on glass it will be understood that articles of other material, such as the metals, may be engraved by the machine without change in the principles of operation involved. Also it is my further object to eliminate any lost motion, and this I accomplish by the mechanism hereinafter described in which the transmission of operative motion to the different parts of. the machine only the most positive means are employed.

In the accompanying drawings forming a part of this specification, Figure 1 is a front elevation of improved machine. Fig. 2 is a plan view. Fig. 3 is a longitudinal section on the line 33, Fig. 2. Fig. 4 is a transverse section on the line 44, Fig. 1. Fig. 5 is a transverse section on the line 55, Fig. 1. Fig. 6 is a longitudinal vertical section through the tool and tracer supporting arm. Fig. 7 is a transverse vertical section on th line 77, Fig. 6.

Similar numerals and letters refer to similar parts in all the views.

The table or bed of the machine is supported by the legs 2 at each end which are connected by the beam 3 at the front of the machine.

The table or bed is preferably rectangular in shape and is cast in one piece and comprises the front and rear side walls a, the end walls I), and the bottom pieces 0, projecting toward each other from the ends, whereby a box-like bed or table is provided. At the Specification of Letters Patent.

Patented March 3, 1908.

Serial No. 371,672.

two rear upper corners of the table supports (1 are cast for a urpose to be described.

On one of tie bottom pieces 0, any suitable electric or other motor 5 is supported from a base 4 from which power is trans mitted to operate the machine by means of a horizontal shaft 6 journaled at one end in a bearing 7 secured to one end wall of the bed or table as best shown in Figs. 2 and 3. On the shaft 6 is keyed a worm 8 which meshes with a worm wheel 9, keyed to a vertical shaft 10 stepped in a bearing 11 secured to the bottom piece 0, and journaled at its upper end in a bearing 12 secured to the under side one of the supports d. On the shaft 10 a worm 13 is keyed which engages a wheel 14 secured about midway of a transverse shaft 15 which is j ournaled in a bearing 16 on the front wall of the table and carries a worm 17, and at its opposite end it extends through the rear wall of the table and carries a worm 18 which engages a worm wheel 19 on a screw feed shaft'20. The shaft 20 is journaled at each end in bearings 21 in projections 22 from the table, as shown in Fig. 2, and engages the teeth of the wheel 23 on stud shaft 24 and the teeth of wheel 25 on stud shaft 26 which operate the shafts 27 and 28, through the connecting flexible shafts 29 and 30, respectively. The mandrels of shafts 27 and 28 are journaled in boxes 31 and 32 and carry the chuck plates 33 and 34, respectively, one of which, in this instance plate 33, carries the model or pattern to be reproduced and the other, plate 34, the article on which the pattern is to be engraved.

The shafts 24 and 26 are each journaled in boxes 35 which are adjustably supported on a bar 36 secured to the rear side of the table. This bar 36 is formed with a longitudinally extending dovetail groove 37 to receive a cor respondingly shaped tongue or tenon 38 formed on the journal boxes 35, and said boxes having flanges 39 through which set screws 40 are inserted to impinge on the bar, 36, in order to draw the tongues or tenons 38 tightly against the walls of the groove 37 and thereby secure the boxes to the bar. To adjust the boxes 35 along the bar 36 it is only necessary to loosen the screws 40 and move the boxes to the desired position and by tightening the screws the boxes are held in their adjusted positions.

The boxes 31 and 32, for the shafts 27 and The upper corners or edges of the bar 41' l are rabbeted, as at 45, to form a guide for 32 which engagewthe same. also provided with the collars 47 which abut the depending flanges 46 of the boxes 31 and The bar 41 is againsttheuprights 42 when thenuts 44 are "tightened. The boxes 31 and 32 are vided with the depending studs or bolts 48 pro- '- which extend through the slotted bar 41 and which are threaded to receive a lock nut 49 inorder to secure the boxes firmly in position after their adjustment.

":From the above description it will b -understood thattheboxes 31 and 32 and the boxes 35 may be adjusted on their suv porting bars to corresponding positions re ative to a each other, or to positions in the same plane, andreadily secured in such positions. And

i also that the bar 41 may be turned on its axis in'the uprights in order to tilt the plates 33 and 34 toany desired angle of inclination from-'thevertical and secured by the nuts 44 justable tracer or stylus holder 51 and the motor 52 forthe drill or cutting tool. The

in. such positions. 5 'An arm 50is arranged above the table and parallel to the bar 41 which supports the adarm 50 is'formed with a longitudinally ex- -tending'dove-tail groove 53 inits face, and

edge is formed with a lateral flange 55. arm 50 is also formed with a groove or recess Ii 56 inits bottom at'each end to receive the one edge, as at 54, is-rabbeted, and its other The curved arms 57 bywhich it-is supported.

i As shown in Figs. 6 and 7, the arms 57 are formed with the square reduced straight portions 58 which are adapted to fit in the recesses 56 in the ends of the arm and are which they. curve upwardly and terminate in "heldtherein by a plate 59 bolted across the recess, as shown in said figure, and from the enlarged perforated ends 60.

The arms 57'are-pivotally connected to the ends of slides 61 by means of the stud 62 to which the arms are hung and secured in posi- 1 tion by the nut 63. The slides 61 each carry a bolt 64 at their outer ends so that a rod 65 -may beattached thereto to connect the two slides, if found necessary, in order to steady the same; See Fig. 2.

. in theupper ends of the vertical slides 66 and Y are normally held pressed inwardly by-spring 67 which are mounted on rods 68 working in a yoke 69 secured to the said vertical slide.

The slides 61 are supported in deep slots or guide ways formed screw shafts 72 which are stepped in bearings 73 secured to the legs of the machine.

. One of the screw shafts 72 is left hand threaded and the other right hand threaded- On each of the shafts 72 is mounted .the'bevel gears '74and 75.- wThese gears are arranged to face eachother and/are cast with the .con-

necting cylinder 76 havinguthe central annular groove 77 formed therein.

The bevel gears 74 7 5, are. secured'against rotation on the shaft'by the keys 78, butare free to move. vertically. thereon and their vertical movement is limited in one direction by the stop 79 projecting from the leg of-the machineand inv the other direction the step bearing- 73. A shiftinglever 80 having afork at one end arranged toextend'intothe groove 77 is pivotally supported from the machinev and its other end isxpivotally connected to the end. of a vertically arranged rod 81 which extends through and has a close sliding fit in a guide bearing 82. onthe frame in order that a degree of force will be necessary to move the rod in its bearing". The upper end ofrthe rod 81 carries atappet 83 arranged in'the path of adog: 85 which projects from the slide 66.

. A bevel gear 86 is secured on the end of a horizontal shaft 87 having its end bearings on the-legs of the machine and is centrally supported by the arms 88 of acasting which is bolted tothe beam 3 by. an arm 84, and which is cast with the 'tubularextension 89 the upper end of which'is bolted to the'table.

Theshaft 87 carries a worm wheel 90 located between the arms 88 which-engages a worm 91 on the end of a vertical shaft 92 extending through the tubular extension 89 I and journaled in a bearing 93 at its upper end. The shaft 92 is supported in position by'the collars 94, one of whichrests onthe bearing 93 and the other on the tubularextension 89. To the upper end of shaft 92a bevellgear 95 issecured which meshes with a similar gear 96 on a horizontal shaft 97ournaled in the bearings 98,'which is operated through the wheel 99 thereon by the worm 17 onshaft 15. I The chuck plates 33 and 34 are provided with means for holding the model or pattern f and the article, 9, on which the. pattern is to be reproduced, such means inthis instance consisting of a threaded rod or bolt it having a head i and extending through theradial slots m formed in the plates, a'nutn being employed to secure the :heads after they have stroke, and thereby sliding the gears 747 5 been adjusted on the model or pattern and j article, as best shown in Figs. 1 and 2.

set screw 8 serves to secure the slide 66 nearest the cutting tool in a fixed or stationary osition when desired.

T e tracer 100 is adjustably mounted in the holder 51 and held in its adjusted position by the set screw 101, and the drill or cutting tool 102 is secured to the shaft of the motor 52.

To duplicate any design to actual size the selected model f is secured to the chuck plate 33, and the blank or article, g, to be engraved is secured to the chuck plate 34, and the model and blank are accurately adjusted to centers. The'stylus or tracer 100 is then adjusted longitudinally into line with the point of the cutting tool 102. The limit of movement of the vertical slides 66 is then adjusted to provide a stroke equal to onehalf of the diameter of the article being engraved. This adjustment of the slides is accomplished by throwing the gears 7 47 5 out of mesh with the gears 86 and rotating the screw shafts 72 so as to screw them into or out of the slides 66. The up and down movement of the slides is accomplished by the gears 7475, which are automatically thrownin and out of engagement with the gears 86 by the shifting lever 80 by means of the rod 81, which is raised or lifted by the dog 85 engaging the tappet 83 on the updownward to throw gears 75 out of mesh with the gears 86, and gears 74 into mesh with said gears 86, in order to change the direction of rotation of the screw shafts 72. When the screw shafts reach the predetermined. end of their down stroke the dog engages the tappet 83 and again shifts the gears so that gears 74 are thrown out of and gears 75 into mesh with the gears 86 to impart an upward stroke to the slides. The motor 5 is then started and revolves the chuck plates 33 and 34 through the chain of gears and screw shaft 20 hereinbefore described, and the motor 52 is started to rotate the drill or cutting tool 102.

If it is desired to produce a reduced duplication of the selected model or pattern, as for instance, where the model selected is eight inches in diameter and the reproduction is to be two inches in diameter, the drill and the tracer are first adjusted so as to center on the article and on the model, respectively, and that slide, 66, adjacent the stylus or tracer 100 is adjusted to a stroke of four inches by the adjusting means described, and the other slide is locked at dead center by the set screw 8. The chuck plate 34 for the blank is then moved along the bar 41 until the determined point of the arc of the circle that the arm 50, which supports the stylus and cutting tool or drill, is to describe indicates a stroke of one inch. The machine is then started and the slide 66 adjacent the stylus is reciprocated and the arm 50 oscillated on the stud 62 of the slide 61. To enlarge the reproduction the adjustment of the slides is reversed.

Having thus described my invention what I claim as new is:

1. An engraving machine comprising an adjustable chuck for the pattern, an adjustable chuck for the blank, means for rotating said chucks, a rotary drill or cutting tool, a stylus or tracer, an arm supporting said drill or cutting tool and stylus or tracer, horizontally slidable supports for said arm, and means for vertically reciprocating said supports.

2. An engraving machine comprising a rotary chuck for the pattern, a rotary chuck for the blank, an adjustable rotary drill or cutting tool, an adjustable stylus or tracer, a vertically reciprocating supporting arm for said drill or cutting tool and stylus or tracer, means for adjusting the throw or stroke of said supporting arm, and mechanism for holding thedrill or cutting tool and the stylus in yielding contact with the blank and pattern, respectively. I

3. An engraving machine comprising a rotary chuck for the pattern, a rotary chuck for the blank, a support adapted to be adjusted to tilt said chucks to an angle from the perpendicular, a rotary drill or cutting tool, a stylus or tracer, a supporting arm or said drill or cutting tool and tracer, horizontally movable members for supporting said arm, and means for vertically reciprocating said arm.

4. An engraving machine comprising a rotary chuck for the pattern, a rotary chuck for the blank, a rotary drill or cutting tool, a stylus or tracer, an arm for supporting said drill or cutting tool and stylus or tracer, horizontally slidable supports to which the ends of said arm are pivoted, means for looking one end of said arm against vertical reciprocation, and means for oscillating the arm from its other end.

5. An engraving machine, comprising r0- tary chucks for the pattern and the blank, a rotary drill or cutting tool and a tracer or stylus, an arm for supporting said drill or cutting tool and stylus or tracer, horizontally movable members for supporting said arm, means for vertically reciprocating said arm, and means for automatically limiting the travel and reversing the direction of movement of said arm.

In testimony whereof, I affiX my signature, in the presence of two witnesses.

JOSEPH A. MoLANE.

Witnesses:

F. T. MARTIN, HARRY FRIEDMAN. 

